ghost_in_shell
let's do it.
根據網上數據：
1. 人類每年約製造排放三千六百億公噸 二氧化碳 （36 billion metric tons of CO2）。
2. 每顆成年樹木每年可以吸收22公斤的二氧化碳
3. 地球上約有3萬億棵樹木 （3 trillion trees）。
如果我的計算沒錯，地球上的樹木每年可以吸收66萬億公斤的二氧化碳，即660億公噸二氧化碳 (66 billion metric tons of CO2)，1.8倍於人類每年製造排放的總量。其中還不包括小型灌木草類及藻類植物的吸收量（藻類植物的固碳效果比樹木更佳）。
現在世界各國的環保組織，政府積極推行的碳零排放計劃 (net-zero carbon emissions)是基於什麽理論數據？全球那麽多科學家，政府官員，80億人口，難道都沒有認真計算過人類活動製造的emissions究竟會不會超過自然界的中和能力從而增加大氣中CO2的濃度？還是我的理解和計算出錯了？
According to online data:
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Human activities generate approximately 36 billion metric tons of carbon dioxide (CO2) emissions annually.
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Each mature tree can absorb 22 kilograms of carbon dioxide per year.
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There are approximately 3 trillion trees on Earth.
If my calculations are correct, the trees on Earth can absorb around 66 trillion kilograms of carbon dioxide annually, equivalent to 66 billion metric tons of CO2. This is 1.8 times the total annual emissions produced by human activities. This calculation does not include the absorption capacity of small shrubs, grasses, and algae (algae, in particular, has a better carbon sequestration efficiency than trees).
The current global initiatives, such as net-zero carbon emissions plans, promoted by environmental organizations and governments worldwide, are based on what theoretical data? With numerous scientists, government officials, and a global population of 8 billion people, has there been a thorough calculation to determine whether human activities will exceed the Earth's natural capacity to neutralize emissions, thereby increasing the concentration of CO2 in the atmosphere? Or is my understanding and calculation incorrect?
